Tight and loose pulley for round belts or cables



(No Model.)

G. A. HENDERSON.

TIGHT 0R LOOSE -PULLEYS FOR ROUND BELTS 0R CABLES.

No. 269,286. Patented Deo. 19, 1882.

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UNITED STATES PATENT EEICE.

GEORGE A. HENDERSON, OF DEOATUR, ILLINOIS.

TIGHT AND LOOSE PULLEY FOR ROUND BELTS OR CABLES.

SPECIFICATION forming part of Letters Patent No. 269,286, dated December19. 1882,

Application filed May 19, 1882. (No model.)

To all whom it may concern Beitknown that I, GEORG-E A.HENDERsoN, acitizen of the United States, residing at Decatur, in the county ot'Macon and State of Illinois, have inventeda new and useful Iluprovementin Tight and Loose Pulleys for bles.

' to revolve freelyon the turned hub of the tixed pulley, its low sideplaced next to the low side of the fixed pulley, so that the belt may beshifted from one to the other over their low sides, any ofthe well-knowndevices being employed for tht purpose. I attain these objects bythedevice illustrated in the accompanying drawings, in which- Figure l is asectional view of the two pulleys as applied toa balance-wheel. Fig.2represents the two pulleys as applied to a shaft, the loose pnlleybeingshown in section. Fig. 3 is a plan ofthe tight pulley shown in Fig. 2.Fig. 4 is a plan of the disk or washer which is secured to the outer endof the hub of thetight pulley, as in Figs. 2 and 5, to prevent lateraldisplacement of the loose pulley. Fig. 5 is a sectional view of the twopulleys adapted for use on sewing-machines which are provided withadjusting-screws for tightening and loosening the balance-wheel.

Similar letters refer to similar parts th roughout the several views.

A represents the tight pulley, having a grooved face, with one highside, c, and one low side, a', and provided with acentral turned hub,A', projecting from its low side. Fitted onto this hub A is a loosepulley, B, of equal or slightly smaller diameter, hav-ing a groovcdface, with high and low sides I) and b,withits low side next the pulleyA. r1`he loose pulley B is retained in proper position upon the hub A bythe disk or washer D, fastened to the outer end of said hub with one ormore screws, d d, as shown in Figs. l, 2, and 5.

c c are screws which pass through the pulley A and screw into thebalance-wheel O, attached to the end ot a shaft, G, their heads beingcountersunk into the low side of said y pulley, so as not to interferewith the movement of the loose pulley B. rI he pulley A shown in Fig. 5is similar to the one shown in Fig. 1, and has a central hole throughthe hub to admit of the passage of the screw c. This screw is not new,as herein applied, and is simply shown to better illustrate theapplication of the pulleys to the balance-wheel of sewing-machines thatare provided with any one ot` the many well-known devices foreugagingand disengagiug the balance-wheel (as is done in manybobbin-winding machines.) The disk or washer D shown in this figure issecured to the end of the hub A with two or more screws, d d, the sameas when applied to a shaft as shown in Fig. 2. l

The tight pulleyAin each'view maybe made a solid disk; or they may becast with arms or spokes, similar to those shown in Fig. 3; or forextreme cheapness both pulleys may be made of wood.

I do not wish to confino myself to any special method ot' uniting thepulley A with the balance-wheel, as it is obvious that it may be cast toform a partot' the balance-wheel, if desired, but in order to apply itto use with bal,

ance-wheels already made it may be secured thereto with screws, as showniu drawings, or in any other convenient manner.

The construction andapplication being described, its operation is asfollows: The low side of each pulley being placed together, and a roundbelt or cable being placed on the grooved face of either pulley, isshifted from one to the other over their low sides by any of thewell-known shifting devices.

Having thus described my invention, what I Lil believe to he new, anddesire to secure by Letters Patent, is-

The tight pulley A, having grooved face', with high sidea andlow sidea', a central turned hub (either solid or having a central hole) adaptedto support a loose pulley, B, also having grooved face, with high andlow sides b and b', theirlow sides placed together to allow the belt orcable to pass from one tothe other, substantially as and for the purposespecified.

2. The tight pulley A, having grooved face, with high sidea and low'side a', a central turned hub (either solid or having a central hole)adapted to supporta loose pulley, B, alsohaving high and low sides b andb', theirlow sides 15 I placed together when directly attached to thebalance-wheel ofseWing-machines, or when attached to the extendedportion of the shaft of other light machinery, substantiallyin themanner shown, and for the purpose speciled.

In testimony that I claim the foregoing-described combination aslnyinvention I hereunto set my hand and affix my seal this 13th day ot'May, A. D. 1882.

GEC. A. HENDERSON,

Witnesses:

S. F. GREER, C. L. WAGGONER.

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